4 files changed, 8 insertions, 14 deletions
diff --git a/actionpack/lib/action_controller/base.rb b/actionpack/lib/action_controller/base.rb
index a70ba0d2e3..1a2cbaab65 100644
--- a/actionpack/lib/action_controller/base.rb
+++ b/actionpack/lib/action_controller/base.rb
@@ -60,17 +60,11 @@ module ActionController
     include ActionController::Compatibility
 
     def self.inherited(klass)
-      ::ActionController::Base.subclasses << klass.to_s
       super
       klass.helper :all
     end
 
-    def self.subclasses
-      @subclasses ||= []
-    end
-
     config_accessor :asset_host, :asset_path
-
     ActiveSupport.run_load_hooks(:action_controller, self)
   end
 end
diff --git a/actionpack/lib/action_controller/metal/helpers.rb b/actionpack/lib/action_controller/metal/helpers.rb
index 89201fb5ee..e0bc47318a 100644
--- a/actionpack/lib/action_controller/metal/helpers.rb
+++ b/actionpack/lib/action_controller/metal/helpers.rb
@@ -1,3 +1,4 @@
+require 'active_support/core_ext/array/wrap'
 require 'active_support/core_ext/class/attribute'
 
 module ActionController
@@ -64,7 +65,7 @@ module ActionController
 
       def helpers_dir=(value)
         ActiveSupport::Deprecation.warn "helpers_dir= is deprecated, use helpers_path= instead", caller
-        self.helpers_path = Array(value)
+        self.helpers_path = Array.wrap(value)
       end
 
       # Declares helper accessors for controller attributes. For example, the
@@ -103,7 +104,7 @@ module ActionController
         # Extract helper names from files in app/helpers/**/*_helper.rb
         def all_application_helpers
           helpers = []
-          helpers_path.each do |path|
+          Array.wrap(helpers_path).each do |path|
             extract  = /^#{Regexp.quote(path.to_s)}\/?(.*)_helper.rb$/
             helpers += Dir["#{path}/**/*_helper.rb"].map { |file| file.sub(extract, '\1') }
           end
diff --git a/actionpack/lib/action_controller/metal/url_for.rb b/actionpack/lib/action_controller/metal/url_for.rb
index c465035ca1..a51fc5b8e4 100644
--- a/actionpack/lib/action_controller/metal/url_for.rb
+++ b/actionpack/lib/action_controller/metal/url_for.rb
@@ -12,17 +12,17 @@ module ActionController
       ).merge(:script_name => request.script_name)
     end
 
-    def _router
-      raise "In order to use #url_for, you must include the helpers of a particular " \
-            "router. For instance, `include Rails.application.routes.url_helpers"
+    def _routes
+      raise "In order to use #url_for, you must include routing helpers explicitly. " \
+            "For instance, `include Rails.application.routes.url_helpers"
     end
 
     module ClassMethods
       def action_methods
         @action_methods ||= begin
-          super - _router.named_routes.helper_names
+          super - _routes.named_routes.helper_names
         end
       end
     end
   end
-end
-\ No newline at end of file
+end
diff --git a/actionpack/lib/action_controller/railtie.rb b/actionpack/lib/action_controller/railtie.rb
index 86395c4d93..9261422f0b 100644
--- a/actionpack/lib/action_controller/railtie.rb
+++ b/actionpack/lib/action_controller/railtie.rb
@@ -2,7 +2,6 @@ require "rails"
 require "action_controller"
 require "action_dispatch/railtie"
 require "action_view/railtie"
-require "active_support/core_ext/class/subclasses"
 require "active_support/deprecation/proxy_wrappers"
 require "active_support/deprecation"